@misc{indiciae1a50172fe34b,
  title = {Mineral resources of Alaska, report on progress of investigations in 1911--Tin resources of Alaska},
  author = {F. L. Hess},
  year = {1912},
  doi = {10.3133/b520b},
  url = {https://pubs.usgs.gov/publication/b520B},
  note = {Source identifier: b520B}
}